Are these tweed spats?

[Tobus]

wellllll...

here's a link to a vendor selling tweed spats: https://www.historicalemporium.com/store/006877.php

I can't (read as "won't") speak to the quality of goods from the vendor, but don't expect a high bar with these guys.

Just for the record, I wasn't interested in a pair of tweed spats; I just thought it was interesting to note that it had been done. I don't think tweed is a suitable material for this purpose, and to be honest I think the matchy-matchy nature of it looks a bit overdone.

Those spats in the link you provided look mighty strange to my eye. The shape is not ideal, and would not go well with a kilt IMHO. I've seen a lot of vendors selling similarly-shaped spats, as if they just slapped something together that sort-of covers the ankle area and called it good. But they remind me of horse boots like I put on my unshod horses for trail riding on rocky terrain. They make the wearer's feet look like hooves.

(photo of horse boots from ValleyVet)